Autor: |
Amaranthus, Michael P.1, Nair, Muraleedharan G.2, Reid, Taylor C.3, Steinfeld, David4 |
Předmět: |
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Zdroj: |
Journal of Sustainable Forestry. 2005, Vol. 20 Issue 3, p1-14. 14p. |
Abstrakt: |
The importance of mycorrhizal colonization in the establishment and growth of forest trees has long been recognized, and mycorrhizal inoculum is used regularly in replanting. The isoflavonoid formononetin (7-hydroxy- 4'-methoxy isoflavone), sold as Myconate®, has been shown to increase colonization by endo- but not ectomycorrhizae. The purpose of this study was to test the ability of Myconate® to increase colonization, nutrient uptake, and growth in ponderosa pine and Douglas-fir seedlings inoculated with Rhizopogon ectomycorrhizae spores. In these tests Myconate® significantly increased root colonization by Rhizopogon in both tree species at 60 mg/L. In Douglas-fir seedlings, potassium content was significantly higher in seedlings treated with 60 mg/L of Myconate® and Rhizopogon parksii than in either the untreated plants, or those treated with R. parksii alone. Treatment with R. parksii and Myconate® significantly increased Douglas-fir phosphorus and nitrogen content over the untreated control, but not over the treatment with R. parksii alone. In ponderosa pine seedlings. Myconate® treatment at 60 mg/L significantly increased nitrogen, but not phosphorus or potassium content over seedlings treated with R. rubeseens alone. Caliper diameter of ponderosa pine was not significantly increased with the application of Myconate®, while in Douglas-fir, both R. parksii and R. parksii plus Myconate® treatments increased caliper size over the control. [ABSTRACT FROM AUTHOR] |
Databáze: |
GreenFILE |
Externí odkaz: |
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